Autographic telegraph



(No Model.)

J. H. ROBERTSON. AUTOGRAPHIO TELEGRAPH.

No. 353,592. Patented Nov, 30, 1886.

UNITED STATES PATENT OFFICE.

.JAMES H. ROBERTSON, OF RUTHERFORD, NEW JERSEY.

AUTOGRAPHICVTELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 353,592, dated November 30, 1886.

A pplicaiion filed April 25', 1886. Serial No. 200,412.

(No model.)

To all whom it may concern:

Be it known'that 1, JAMES H. ROBERTSON, a citizen of the United States. and a resident of Rutherford, Bergen county, New Jersey, have invented a new and useful Improvement in Autographic Telegraphs, of which the following is a specification.

The object of my invention is to cause the armature or armatures used in the receivers of IO autographic writing-machines to move in a more steady manner than has heretofore been possible. I accomplish this object by immersing the armature or armatures, or any part connected therewith, in a vessel containing, 1 preferably, a liquid-as, for example, water, alcohol, glycerine, mercury, oil, &c. Any other substance serving the samepurpose may, however, be used.

In the accompanying drawings, forming part of this specification, Figure 1 illustrates my invention applied to an autographic telegraph provided with two armatures. Fig. 2 represents the same applied to an autographic telegraph in which one armature serves the purposes of two. Fig. 3 is a cross-section taken on line x :v of Fig. 2. Figs. 4 and 5 illustrate modifications of my invention.

I have illustrated my invention in Fig. 1 as applied to the particular receiver of an autographic telegraph described and shown ina former application, Serial No. 177,485, filed by me under the date of September 18, 1885, and I have shown only so much of said former invention as is necessary to a full understanding of the invention herein claimed. The armatures 9 and 10 are arranged over magnets 14. and 15, as in said former application, and the arrangements of circuits (not shown) may be considered thesame as therein described. I place under each armature a vessel or receptacle, 1, and fill the same with, preferably, a liquid to a height sufficient to immerse the lower ends of said armatures therein, substantially as illustrated. This causes the armatures to move more steadily. The stylus v17, instead of being pivoted close to the side of armature 9,; as in my former application, before referred to, is pivoted to the end of a lateral extension, 2, of said armature, 5o thesaid extension being of a length sufficient to permit the stylus to operate properly outside of the liquid-receptacle. The armature 10 is connected with stylus 17 by cord 18, and said stylus is returned to normal position by spring 16, all as described in my said former application.

In Figs. 2 and 3 I have shown two electromagnets, 3 and 4, placed at right anglesto and 'near each other, so that one armature, 5, will serve for both. I surround this armature with a vessel, 6, of non-magnetic material, which vessel I fill with liquid, as hereinbefore described. The armature 5 is supported in normal position on a spring-Wire, 7, which passes through the bottom of the receptacle and base, and is fastened at 8 in any suitable and effective manner. A rod, 11, extends upwardly from the armature through an aperture in table 23, and has pivoted to it at 12 an arm, 21, which carries the stylus 13. The latter rests by gravity on the paper 24. The aperture in table 23 is sufficiently large to allow for the maximum movement in either direction of the armature 5. I have shown the stylus combined with a reservoir for ink; but so far as the liguid-receptacle is concerned any other kind or form of stylus may be used.

In Fig. 4. I have varied the construction shown in Fig. 2 by providing the rod 11 with an extension, 20, arranged to dip into an annular 8o trough or vessel, 19, containing liquid. This annular vessel takes the place of vessel 6 in Fig. 2.

In Fig. 5 I have extended the stylus-carrying arm 21 in rear of its pivot 12 and combined it with aliquid-receptacle, 22, as shown. This construction serves the same purpose as those illustrated in Figs. 2 and 4, and operates in substantially the same manner. I therefore consider these several constructions equivalents of each other.

I am aware that alongitudinally-oscillating stylus, incapable of lateral movement, has been combined with an armature partially sustained or floating in liquid; but such a device has nothing in common with my invention, and I lay no claim thereto.

I lay no claim in this application to an arma ture and liquid-receptacle, the armature having a projection immersed in the liquid, but 1L0 i V p j 353,592

reserve the right to claim such subject-matter nation, with the receiving-stylus arranged to in an application filed by me June 30, 1886, have a free lateral motion over the surface of Serial No. 206,692, autographic telegraph. the paper and armature or armatures', of a 15 What I claim, and desire to secure by United liquid-containing receptacle in which said 5 States Letters Patent, is armature 0r armatures are immersed, substan- 1. In an autographic telegraph, the combitially as described. 7 nation, with the receiving-stylus arranged to In testimony whereof I have hereunto subhave a free lateral motion over the surface of scribed my name. the paper and armature or armatures, of a JAMES H. ROBERTSON. 'Io liquid-containing receptacle, substantially as Witnesses:

described. JNO. E. GAVIN,

2. In an autographic telegraph, the conibi- JOHN LPRATT. 

